Contacts of the helix formed by residues 166 - 192 (chain C) in PDB entry 3P9K


Residue contacts within the protein are derived with the CSU software (Sobolev V., Sorokine A., Prilusky J., Abola E.E. and Edelman M. (1999) Automated analysis of interatomic contacts in proteins. Bioinformatics, 15, 327-332). A short description of the analytical approach is given at the end of the page.
For CSU analysis of other PDB entry

Note:
Non-standard 3 letter residue codes indicate a heterogroup. To identify and analyse, use LPC software

Legend:
Dist - nearest distance (Å) between atoms of two residues
Surf - contact surface area (Å2) between two residues
HB   - hydrophilic-hydrophilic contact (hydrogen bond)
Arom - aromatic-aromatic contact
Phob - hydrophobic-hydrophobic contact
DC   - hydrophobic-hydrophilic contact (destabilizing contact)
+/-  - indicates presence/absence of a specific contacts
*    - indicates residues forming contacts  by their side chain
       (including CA atoms)
Residues in contact with ASP 166 (chain C).
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    132C  VAL*     4.1     6.1    -      -       -      +
    162C  TYR*     2.8    46.2    +      -       +      +
    163C  HIS*     3.4     4.4    -      -       -      +
    164C  GLY      3.6     0.2    -      -       -      -
    165C  THR*     1.3    81.1    -      -       -      +
    167C  PRO*     1.3    60.3    -      -       -      +
    168C  ARG*     3.2    17.0    +      -       -      +
    169C  PHE*     3.1    26.6    +      -       +      +
    170C  ASN*     2.9    27.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with PRO 167 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163C  HIS      5.0     0.4    -      -       -      +
    164C  GLY      5.7     2.5    -      -       -      +
    165C  THR      3.7     7.4    -      -       -      +
    166C  ASP*     1.3    85.5    -      -       -      +
    168C  ARG*     1.3    65.0    +      -       -      +
    170C  ASN*     3.5     9.2    +      -       +      +
    171C  ARG*     3.3    20.8    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 168 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    130C  ASP*     2.9    41.0    +      -       -      -
    131C  LYS*     5.5     2.8    -      -       -      +
    132C  VAL*     3.7    17.4    -      -       -      +
    166C  ASP*     3.2    11.6    +      -       -      +
    167C  PRO*     1.3    78.6    -      -       -      +
    169C  PHE*     1.3    68.8    +      -       -      +
    171C  ARG*     3.4     7.1    +      -       -      +
    172C  VAL*     3.2    33.5    +      -       +      +
----------------------------------------------------------
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Residues in contact with PHE 169 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127C  MET*     4.5     2.0    -      -       +      -
    130C  ASP*     3.4    33.4    -      -       +      -
    132C  VAL*     3.7    22.0    -      -       +      -
    133C  LEU*     3.6    42.4    -      -       +      -
    151C  PHE*     5.8     1.1    -      +       -      -
    162C  TYR*     4.3     7.4    -      +       -      -
    163C  HIS*     3.5    37.9    -      +       -      -
    166C  ASP*     3.1    27.8    +      -       +      +
    168C  ARG*     1.3    78.7    -      -       -      +
    170C  ASN*     1.3    57.8    +      -       -      +
    172C  VAL*     3.1    14.4    +      -       +      +
    173C  PHE*     2.7    42.6    +      +       +      +
----------------------------------------------------------
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Residues in contact with ASN 170 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    163C  HIS*     3.4    35.6    +      -       -      +
    166C  ASP      2.9    18.0    +      -       -      +
    167C  PRO*     3.6    11.0    +      -       +      +
    168C  ARG      3.3     0.2    -      -       -      -
    169C  PHE*     1.3    79.5    -      -       -      +
    171C  ARG*     1.3    57.3    +      -       -      +
    173C  PHE*     3.6     4.8    -      -       -      +
    174C  ASN*     2.9    53.7    +      -       -      +
    231C  HIS*     3.5    12.9    -      -       -      -
    232C  VAL*     5.1     1.0    -      -       -      +
    235C  GLU*     2.9    34.4    +      -       -      +
----------------------------------------------------------
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Residues in contact with ARG 171 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167C  PRO      3.3    10.1    +      -       -      +
    168C  ARG*     3.7     9.2    -      -       -      +
    169C  PHE      3.1     0.2    -      -       -      -
    170C  ASN*     1.3    79.1    -      -       -      +
    172C  VAL*     1.3    64.2    +      -       +      +
    174C  ASN*     4.5     6.1    -      -       -      +
    175C  GLU*     2.8    66.3    +      -       +      +
----------------------------------------------------------
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Residues in contact with VAL 172 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123C  ALA      4.6     2.5    -      -       -      +
    126C  LEU*     4.1    11.0    -      -       +      +
    127C  MET*     3.6    35.9    -      -       +      +
    130C  ASP*     4.3     4.5    -      -       -      +
    168C  ARG*     3.2    35.8    +      -       +      +
    169C  PHE*     3.1    19.8    +      -       +      +
    171C  ARG*     1.3    80.2    -      -       +      +
    173C  PHE*     1.3    64.0    +      -       -      +
    175C  GLU*     3.9     4.5    -      -       -      +
    176C  GLY*     3.1    18.7    +      -       -      -
----------------------------------------------------------
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Residues in contact with PHE 173 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    127C  MET*     3.6    25.4    -      -       +      +
    133C  LEU*     5.8     1.3    -      -       +      -
    160C  PHE*     4.2     4.0    -      +       -      -
    163C  HIS*     3.4    39.7    -      +       +      +
    169C  PHE*     2.7    33.0    +      +       +      +
    170C  ASN*     3.6     5.6    -      -       -      +
    172C  VAL*     1.3    71.7    -      -       -      +
    174C  ASN*     1.3    81.2    +      -       -      +
    176C  GLY*     3.0    12.8    +      -       -      -
    177C  MET*     3.1    35.0    +      -       +      +
    403C  SAH      3.9    26.9    -      -       -      -
    603C  CIY      3.8    36.6    -      +       -      -
----------------------------------------------------------
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Residues in contact with ASN 174 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    170C  ASN*     2.9    51.0    +      -       -      +
    171C  ARG*     4.0     4.6    -      -       -      +
    173C  PHE*     1.3    87.7    -      -       -      +
    175C  GLU*     1.3    60.6    +      -       +      +
    177C  MET*     3.3     5.8    +      -       -      +
    178C  LYS*     2.8    31.5    +      -       -      +
    207C  GLY*     5.2     2.8    -      -       -      -
    208C  VAL*     4.1    27.4    +      -       +      +
    232C  VAL*     4.7    17.4    -      -       -      +
    235C  GLU*     4.0     7.9    +      -       -      +
    403C  SAH      5.0     3.8    +      -       -      -
----------------------------------------------------------
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Residues in contact with GLU 175 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123C  ALA*     4.0     7.2    -      -       +      -
    171C  ARG*     2.8    65.0    +      -       +      +
    172C  VAL*     3.9     5.4    -      -       -      +
    174C  ASN*     1.3    71.5    -      -       +      +
    176C  GLY*     1.3    65.7    +      -       -      +
    178C  LYS*     3.1    40.7    +      -       -      +
    179C  ASN*     2.7    41.7    +      -       -      +
    208C  VAL*     5.7     2.1    -      -       -      +
----------------------------------------------------------
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Residues in contact with GLY 176 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    123C  ALA*     3.8    22.2    -      -       -      +
    124C  LEU*     3.7    22.2    -      -       -      +
    127C  MET*     4.7     2.2    -      -       -      -
    172C  VAL      3.1    11.2    +      -       -      -
    173C  PHE      3.0     8.2    +      -       -      -
    175C  GLU*     1.3    78.8    -      -       -      +
    177C  MET*     1.3    60.7    +      -       -      +
    179C  ASN*     4.0     1.2    -      -       -      +
    180C  HIS*     3.3    23.7    +      -       -      +
----------------------------------------------------------
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Residues in contact with MET 177 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    124C  LEU*     3.7    15.7    -      -       +      -
    127C  MET*     3.7    31.0    -      -       +      -
    173C  PHE*     3.1    33.6    +      -       +      +
    174C  ASN*     3.7     8.3    -      -       -      +
    176C  GLY*     1.3    74.2    -      -       -      +
    178C  LYS*     1.3    65.9    +      -       -      +
    180C  HIS*     3.2     5.4    +      -       -      +
    181C  SER*     2.9    26.9    +      -       -      -
    262C  LYS*     4.5     0.2    +      -       -      -
    263C  TRP*     3.8    15.3    -      -       +      -
    403C  SAH      3.7    27.8    -      -       +      +
    603C  CIY      3.7    38.6    -      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 178 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    119C  VAL*     5.6     2.2    -      -       -      -
    174C  ASN      2.8    21.3    +      -       -      +
    175C  GLU*     3.1    39.2    +      -       -      +
    177C  MET*     1.3    73.5    -      -       -      +
    179C  ASN*     1.3    68.3    +      -       -      +
    181C  SER*     3.2     6.5    +      -       -      -
    182C  ILE*     3.0    41.8    +      -       +      +
    208C  VAL*     3.8    25.3    -      -       +      +
    210C  ALA*     3.7    23.6    -      -       +      -
    239C  PHE*     6.2     1.6    -      -       +      -
    403C  SAH      4.9     1.1    -      -       -      -
----------------------------------------------------------
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Residues in contact with ASN 179 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    118C  GLY      4.3     1.9    -      -       -      +
    119C  VAL*     3.2    41.2    -      -       +      +
    120C  SER*     3.2    22.3    +      -       -      +
    123C  ALA*     3.8    17.9    -      -       +      +
    124C  LEU*     5.8     1.1    -      -       +      +
    175C  GLU*     2.7    47.6    +      -       -      +
    176C  GLY      4.0     2.9    -      -       -      +
    178C  LYS*     1.3    81.5    -      -       -      +
    180C  HIS*     1.3    63.3    +      -       -      +
    182C  ILE*     3.5     2.6    +      -       -      +
    183C  ILE*     3.3    26.1    +      -       -      +
----------------------------------------------------------
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Residues in contact with HIS 180 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  MET*     3.6    30.1    -      -       +      +
    124C  LEU*     3.7    17.5    -      -       +      -
    176C  GLY      3.3    15.0    +      -       -      +
    177C  MET      3.2     4.3    +      -       -      +
    179C  ASN*     1.3    79.5    -      -       -      +
    181C  SER*     1.3    57.2    +      -       -      +
    183C  ILE*     3.4     3.0    +      -       -      +
    184C  ILE*     3.0    62.8    +      -       +      +
    262C  LYS*     2.9    28.2    +      -       -      -
    263C  TRP*     3.4    42.6    -      +       +      -
    293C  VAL*     6.2     0.2    -      -       +      -
    351C  ALA      5.4     1.8    +      -       -      -
    353C  ALA*     5.5     4.5    -      -       +      -
     21D  LEU*     4.0    10.5    -      -       +      +
----------------------------------------------------------
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Residues in contact with SER 181 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    177C  MET      2.9    10.5    +      -       -      -
    178C  LYS*     3.6     6.5    -      -       -      -
    180C  HIS*     1.3    74.9    -      -       -      +
    182C  ILE*     1.3    59.0    +      -       -      +
    185C  THR*     2.7    39.9    +      -       -      -
    210C  ALA*     5.3     1.3    -      -       -      -
    211C  THR*     3.3    25.6    +      -       -      -
    262C  LYS*     3.0    19.7    +      -       -      +
    403C  SAH      2.3    31.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 182 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    117C  ASP*     4.1    24.1    -      -       +      +
    119C  VAL*     3.9    33.0    -      -       +      -
    178C  LYS*     3.0    41.7    +      -       +      +
    179C  ASN      3.9     4.0    -      -       -      +
    180C  HIS      3.4     0.2    -      -       -      -
    181C  SER*     1.3    75.8    -      -       -      +
    183C  ILE*     1.3    62.4    +      -       +      +
    185C  THR*     4.6     3.5    -      -       -      -
    186C  LYS*     3.6    18.5    +      -       -      +
    210C  ALA*     4.1    20.4    -      -       +      +
----------------------------------------------------------
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Residues in contact with ILE 183 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    111C  PHE*     5.9     7.4    -      -       +      -
    115C  ASN*     3.1    32.5    -      -       -      +
    117C  ASP*     5.5     0.9    -      -       -      +
    119C  VAL*     3.3    20.0    -      -       +      +
    120C  SER*     4.8     8.7    -      -       -      +
    121C  MET*     4.4    23.1    -      -       +      -
    179C  ASN      3.3    15.6    +      -       -      +
    180C  HIS      3.7     7.2    -      -       -      +
    181C  SER      3.1     0.4    -      -       -      -
    182C  ILE*     1.3    82.2    -      -       +      +
    184C  ILE*     1.3    67.4    +      -       +      +
    186C  LYS*     3.6    12.2    +      -       +      +
    187C  LYS*     3.6    17.5    +      -       +      +
    350C  TYR*     5.7     5.2    -      -       +      -
     17D  CYS*     5.0    10.3    -      -       -      -
----------------------------------------------------------
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Residues in contact with ILE 184 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    121C  MET*     4.9     2.5    -      -       +      -
    180C  HIS*     3.0    47.2    +      -       +      +
    181C  SER      4.0     1.8    -      -       -      +
    183C  ILE*     1.3    84.4    -      -       +      +
    185C  THR*     1.3    61.4    +      -       -      +
    187C  LYS*     3.2     7.4    +      -       -      +
    188C  LEU*     2.8    27.8    +      -       +      +
    262C  LYS*     4.2     9.2    -      -       +      -
    293C  VAL*     4.1    18.2    -      -       +      -
    349C  ILE*     4.4     7.1    -      -       +      +
    350C  TYR*     4.0    25.8    -      -       +      +
    351C  ALA*     4.5    12.8    -      -       +      +
    353C  ALA*     4.1    20.2    -      -       +      -
----------------------------------------------------------
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Residues in contact with THR 185 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    181C  SER*     2.7    29.4    +      -       -      -
    182C  ILE*     4.6     3.6    -      -       -      -
    184C  ILE*     1.3    70.6    -      -       -      +
    186C  LYS*     1.3    57.2    +      -       -      +
    188C  LEU*     2.9    14.4    +      -       +      +
    189C  LEU*     2.7    41.3    +      -       +      +
    211C  THR*     3.6    25.4    +      -       +      +
    214C  ALA*     4.0    27.8    -      -       +      -
    215C  ILE*     4.0    23.1    -      -       +      -
    262C  LYS*     5.2     3.8    -      -       -      +
----------------------------------------------------------
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Residues in contact with LYS 186 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    115C  ASN*     6.3     0.7    -      -       -      +
    116C  GLU*     3.6    30.6    +      -       -      +
    117C  ASP*     4.4    12.3    +      -       -      +
    182C  ILE      3.6    12.2    +      -       -      +
    183C  ILE*     3.6    12.4    +      -       +      +
    184C  ILE      3.3     0.4    -      -       -      -
    185C  THR*     1.3    79.2    -      -       -      +
    187C  LYS*     1.3    67.1    +      -       +      +
    189C  LEU*     3.3    12.7    +      -       -      +
    190C  GLU*     2.9    44.4    +      -       +      +
----------------------------------------------------------
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Residues in contact with LYS 187 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    183C  ILE*     3.6    13.3    +      -       +      +
    184C  ILE*     3.2     9.6    +      -       -      +
    186C  LYS*     1.3    81.2    -      -       +      +
    188C  LEU*     1.3    67.5    +      -       -      +
    190C  GLU*     3.0    32.6    +      -       -      +
    191C  LEU*     3.1    22.9    +      -       +      +
    349C  ILE*     4.0    15.5    -      -       +      +
    350C  TYR*     3.8    55.4    +      -       +      -
     10D  ALA      4.6     7.9    -      -       -      +
----------------------------------------------------------
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Residues in contact with LEU 188 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    184C  ILE*     2.8    17.6    +      -       +      +
    185C  THR*     3.0    20.6    -      -       +      +
    187C  LYS*     1.3    77.6    -      -       -      +
    189C  LEU*     1.3    57.8    +      -       +      +
    190C  GLU      3.0     1.2    +      -       -      -
    192C  TYR*     2.8    64.2    +      -       +      +
    195C  PHE*     3.7    31.4    -      -       +      -
    211C  THR*     5.8     1.1    -      -       +      -
    215C  ILE*     4.6     9.0    -      -       +      -
    260C  LEU*     5.2     3.6    -      -       +      -
    291C  VAL*     5.9     0.4    -      -       +      -
    293C  VAL*     4.5    21.8    -      -       +      -
    349C  ILE*     3.8    25.1    -      -       +      +
    355C  ALA*     4.3     8.3    -      -       +      -
----------------------------------------------------------
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Residues in contact with LEU 189 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    185C  THR*     2.7    35.3    +      -       +      +
    186C  LYS*     3.8     9.0    -      -       -      +
    187C  LYS      3.3     0.2    -      -       -      -
    188C  LEU*     1.3    72.5    -      -       +      +
    190C  GLU*     1.3    60.9    +      -       +      +
    192C  TYR      4.6     7.9    -      -       -      +
    193C  HIS*     5.9     1.4    +      -       -      -
    195C  PHE*     4.2    12.8    -      -       +      -
    214C  ALA*     3.8    15.3    -      -       +      +
    215C  ILE*     4.2    17.0    -      -       +      -
    218C  HIS*     3.7    46.1    +      -       +      +
    219C  TYR*     3.8    33.0    +      -       +      +
----------------------------------------------------------
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Residues in contact with GLU 190 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    186C  LYS*     2.9    49.0    +      -       +      +
    187C  LYS*     3.0    36.1    +      -       -      +
    189C  LEU*     1.3    81.8    -      -       +      +
    191C  LEU*     1.3    72.6    +      -       +      +
    192C  TYR      3.7     0.4    -      -       -      -
    193C  HIS*     4.7    11.4    +      -       -      -
----------------------------------------------------------
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Residues in contact with LEU 191 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    167B  PRO*     6.0     6.3    -      -       +      -
    187C  LYS*     3.1    22.6    +      -       +      +
    190C  GLU*     1.3    93.3    -      -       +      +
    192C  TYR*     1.3    58.3    +      -       -      +
    193C  HIS*     4.3    11.9    +      -       -      -
    347C  THR*     4.4    12.5    -      -       +      +
    348C  TYR      4.7     4.0    -      -       -      +
    349C  ILE*     3.2    44.4    -      -       +      +
    350C  TYR*     5.5     1.6    -      -       +      -
----------------------------------------------------------
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Residues in contact with TYR 192 (chain C). Click here for Legend to table.
----------------------------------------------------------
                                  Specific contacts
                               ---------------------------
     Residue       Dist    Surf   HB    Arom    Phob    DC
----------------------------------------------------------
    188C  LEU*     2.8    36.8    +      -       +      +
    189C  LEU*     4.6     8.1    -      -       -      +
    190C  GLU      3.7     0.2    -      -       -      -
    191C  LEU*     1.3    79.8    -      -       -      +
    193C  HIS*     1.3    66.0    +      -       -      +
    194C  GLY*     3.4    29.7    -      -       -      -
    195C  PHE*     3.9    37.3    +      +       -      -
    219C  TYR*     4.3     9.0    +      -       -      -
    289C  LYS*     3.7     0.9    +      -       -      -
    291C  VAL*     3.1    19.1    -      -       +      +
    345C  LYS*     5.4     2.5    -      -       -      -
    347C  THR*     4.6    14.6    -      -       +      -
    349C  ILE*     4.3     5.6    -      -       +      -
    355C  ALA*     4.0    18.6    -      -       +      -
    357C  GLU*     2.4    46.3    +      -       +      +
----------------------------------------------------------
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A short description of the analytical approach
The contact analysis used in this page is based upon the approach developed in: Sobolev V., Wade R.C., Vriend G. and Edelman M. PROTEINS (1996) 25, 120-129. Contact legitimacy depends on the hydrophobic-hydrophilic properties of the contacting atoms. In order to define it, for each inter-atomic contact, eight atom classes have been introduced:


   I  Hydrophilic      - N and O that can donate and accept hydrogen bonds
                         (e.g., oxygen of hydroxyl group of Ser. or Thr)
  II  Acceptor         - N or O that can only accept a hydrogen bond
 III  Donor            - N that can only donate a hydrogen bond
  IV  Hydrophobic      - Cl, Br, I and all C atoms that are not in
                         aromatic rings and do not have a covalent bond to
                         a N or O atom
   V  Aromatic         - C in aromatic rings irrespective of any other 
                         bonds formed by the atom
  VI  Neutral          - C atoms that have a covalent bond to at least one
                         atom of class I or two or more atoms from class II
                         or III; atoms; S, F, P, and metal atoms in all cases
 VII  Neutral-donor    - C atoms that have a covalent bond with only one
                         atom of class III
VIII  Neutral-acceptor - C atoms that have a covalent bond with only 
                         one atom of class II
For each pair of contacts the state of legitimacy is shown below:

Legend:
+, legitimate
-, illegitimate
------------------------------------------------------------
  Atomic class           I  II  III   IV   V   VI  VII  VIII
------------------------------------------------------------
   I  (Hydrophilic)      +   +    +    -   +   +    +    +
  II  (Acceptor)         +   -    +    -   +   +    +    -
 III  (Donor)            +   +    -    -   +   +    -    +
  IV  (Hydrophobic)      -   -    -    +   +   +    +    +
   V  (Aromatic)         +   +    +    +   +   +    +    +
  VI  (Neutral)          +   +    +    +   +   +    +    +
 VII  (Neutral-donor)    +   +    -    +   +   +    -    +
VIII  (Neutral-acceptor) +   -    +    +   +   +    +    -
------------------------------------------------------------
Warning!
Atom classes for heterogroups are automatically assigned based on the atomic coordinates. However, in three cases (see below) the automatic assignment is currently ambiguous. In these cases, the user is advised to manually analyse the full list of contacts using LPC software.
1. Carbon atoms belonging to a 4-, 5- or 6-member ring are 
   considered "aromatic" (Class V) if the ring is approximately
   planar, and "hydrophobic" (Class IV) or "neutral" (Classes
   VI, VII, VIII) if the ring is non-planar.
2. The oxygen atom of a carbonyl or hydroxy group is considered
   "hydroxy" (Class I) if the CO bond is longer than 1.29 Å, and
   "carbonyl" (Class II) if shorter.
3. All nitrogen atoms are considered "hydrophilic" (Class I).

Please E-mail any questions and/or suggestions concerning this page to Vladimir.Sobolev@weizmann.ac.il